TM 55-2840-251-23Section VIII GENERAL MAINTENANCE PROCEDURES (Continued)1-77 CLEANING (Cont)3. Compressor Wash (Cont)d.Prepare 5 gallons of rinse solution (Refer toTable 4).TABLE 4 MIXING OF RINSE SOLUTION (BYVOLUME)AMBIENTWATERMETHANOLTEMPERATURE+ 36°F and100%-above- 12°F to50%50%+ 30°FBelow - 12°F40%60%e.Performance Recovery Motoring WashWARNINGOPERATION OF AIRCRAFT ONGROUND Engines shall be startedand operated only by authorizedpersonnel.CAUTIONUse of the correct mixture as specifiedin subparagraph 3.c., is veryimportant, not only when thetemperature is below freezing at thetime of washing, but also if thetemperature is expected to be lowbetween the time of washing and thenext start.CAUTIONDo not motor engine for more than 30seconds. Observe starter coolingperiod.NOTETo prevent deposits caused by the useof hard water, engine must be allowedto cool to below 150° F. Minimumcooling period of 40 minutes must beallowed since the engine was lastoperated.(1)Connect wand or wash ring to supply fromwash rig.(2)Fill wash tank with prepared solution(Refer to subparagraph 3.c,).(3)Pressurize tank at 30 to 50 psi with air ornitrogen supply.(4)Disconnect P3 air line from FCU (Task10-4).(5)Insure that the ignition switch is OFF.(6)Insure that compressor bleed air is off ordisconnected.(7)Fuel boost pump ON.(8)Throttle lever at idle.(9)Shut off lever is in OFF position.GO TO NEXT PAGE1-104